linux-kernel - Re: [PATCH v3 1/2] acpi: Add "acpi_osi=" for ASUS X200MA to enable, brightness keys

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Message-ID: <5492E753.7090505@gmail.com>
Date:	Thu, 18 Dec 2014 17:40:19 +0300
From:	Dmitry Tunin <hanipouspilot@...il.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	Josh Boyer <jwboyer@...oraproject.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Aaron Lu <aaron.lu@...el.com>
Subject: Re: [PATCH v3 1/2] acpi: Add "acpi_osi=" for ASUS X200MA to enable,
 brightness keys

But at least two devices work well with this quirk.
That must be some ASUS UEFI firmware fault, but still it is a workaround.
You can find some more information in those bugzilla reports.

https://bugzilla.kernel.org/show_bug.cgi?id=89401
https://bugzilla.kernel.org/show_bug.cgi?id=70241

18.12.2014 17:36, Matthew Garrett пишет:
> That's odd - it looks like the default behaviour in the absence of any
> OSI strings is to just default to an OSYS value that matches Windows
> 2012, so disabling the 2013 value should be equivalent. If it's not,
> it's definitely not safe to turn off all values - there are several
> devices that change behaviour as a result.
>
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